- Slimeology: Ecto slimes are a light blue with a subtle green tinge and a faint glow. Like Phosphor slimes, they are light sensitive and only come out at night. Ecto slimes are easily startled, and it's because of that that they've developed the eerie ability to become immaterial, allowing them to hide away in solid matter.
- Rancher risks: Ecto slimes cannot be vac'd up while they are ethereal, making them tricky to catch and control. Additionally, an agitated ethereal ecto slime can cause corral force fields to malfunction if is persistent enough in trying to pass through. The only way to solidify an ecto slime is by startling it. Sudden light will startle them, so keep your flashlight handy.
- Plortonomics: Ecto plorts are a key factor in the technology that allows slime corral force fields to contain slimes while letting ranchers pass through freely. Without ecto plorts, slime ranching itself would be a lot more difficult!
- Diet: Fruit
- Favourite food: Ghost Pepper
The Ghost Pepper is a spicy fruit that grows on tall bushes found rarely in the Glass Desert. The fruit is a thin, white pepper with a curl at the end, and can only be seen at night. - Location: Seen at midnight on the island near the Indigo Quarry.